Milling-machine spindle-saddle.



E. FELDMANN. MILLING MACHINE SPINDLE SADDLE. APPLICATIONr|Ln1uNE8.l914`.

1,143,373. Patented .111110 15, 1915.

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E. FELDNIANN.

MILLING MACHINE SPINDLE SADDLE.

APPLICATION FILED JUNE 8,1914. 1,143,373. Patented June 15, 1915.

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ERNST FELDMANN, OF ROCKFORD, ILLINOIS, ASSIGNOR TO THE INGERSOLL MILLINGMACHINE CO., OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

`MILLIN'G-lVlACI-IINE SPINDLE-SADDLE.

Specification of Letters Patent.

Patented June 15;, 1915.

Application filed. June 8, 1,914; Serial No; 843,876.

To all whom it may concern Be it known that I, ERNST FELDMANN, 'acitizen of Germany, residing at Rockford, in the county'of lVinnebagoand State of Illinois, have invented certain new and use#V fulImprovements in Milling-hIachine Spindle-Saddles, `of which thefollowing is a specification. Y

rThis invention relates in general to milling machines and has moreparticular reference to the saddle and the spindle-supporting anddriving mechanism of what is commonly termed a face plate millingmachine. Y

In order to insure smooth and perfect work and to prevent vibration andchattering orf the tools it is essential in machines of'this characterthat the tool-spindle be mounted and held with the utmost rigidity.

`With this end in view one of the primary objects of my invention is theprovision of novel means for mounting the spindle so` that it can beadjusted longitudinally to suit the requirements of the work and whichwill hold the spindle rigidly and -inleXibly in working position. Y

Another Vobject is the provision of improved driving means which willdrive the spindle vat the toolend, thereby obviating any vibration orirregularity in the oper-V ation of the'tool which might result fromtorsional strains on the spindle if it were driven from the end oppositeto that on which the tool is mounted..V

A further object is the provision of means for rigidly and unyieldinglyconnecting the projecting ends of the spindle sleeve and pinion shaftsleeve so that vibration of the sleeves will be obviated and so that thcsleeves will move together as a unitary structure during theirlongitudinal Aadjusting movements.

A still further object is the provision of simple and e'liicient meansfor locking the spindle and pinion shaft against longitudinal movementafter they have been adjusted ing my invention; Fig. 2 is a longitudinalsectional view takenv on the line 2-2 of Fig. l; Fig. 3' is an endelevation looking toward the left inFig. l; Figs. 4 and 5 are -sectionalviews taken on the lines 4% and 3*5 of Fig. 1; Fig. 6 is a plan view ofthe construction shown in Fig. l; Fig. 7 is an end elevation lookingtoward the right in Figs. l and 6, a portion of the casing being brokenaway to show the underlying gears; Fig. 8 is a sectional view on theline 8 8 of Fig. 6, and Fig. 9 is a transverse sectional view onthe line9-9 of Fig. l.

Referring to the drawings, reference character l1 designates a portionof the main frame of the milling machine which is formed to provide atrack or guideway upon which the spindle saddle 12 may be adjusted. Thesaddle may be retained in adjusted position by any suitable holdingmeans, one practical form being illustrated in the drawings ascomprising overlying lips 13 carried by the saddle and adapted to beclamped against an opposed face of the main frame guideway by means ofclamping bolts 14.

.lfhile the guideway is illustrated on the drawings as being verticallydisposed so that the tool carrying spindle in the saddle is arrangedhorizontally it will be manifest that the track may be horizontal andthe spindle disposed vertically without' departing from the essence ofmy present invention.

The spindle saddle 12 is cored longitudinally to provide a pair ofparallel bores 15 and 16 in which the tool spindle 17 and the pinionshaft 18 are mounted in a manner to be later described.

lVithin the bore 15 is snugly fitted the spindle sleeve 19 which iscapable of longitudinal adjust-ment within the bore but has a machinedcontactfit so that vibration of the sleeve in the saddle is precluded.

rlhe spindle 17 is ournaled in the sleeve 19 and a bushing 21 isinterposed between the spindle and the sleeve, the endof the bushingbeing flanged radially over the end of the sleeve as shown in Fig. 8,and the sleeve having an annular shoulder 22 against which the inner endof bushing 21 abuts.

A' second bushing 23 is disposed within the contracted portion of thesleeve 19 around the spindle 17, and a lock nut 2a threaded onto thespindle at the inner end 'los of the sleeve serves to prevent outwardmovement of the spindle with respect to the sleeve, suitable washers orbearing rings 25 being interposed between the lock nut 24 and anannular' shoulder 26 formed at the inner end of the sleeve.

The outer end of the spindle is equipped with a gear wheel 27 which mayberigidly secured to the spindle in any approved manner, the gearbeingpishown in the present instance as formed integral with thespindle. It will be manifest that the inner face of the gear 27 togetherwith the lock nut 24 precludes longitudinal movement of the spindle withrespect to the sleeve.

In order to obviate any lateral movement of the spindle the saddle isformed at the rear of the bore 15 with a supplemental bearingQS,preferably equipped with a. suitable bushing 29 in which the spindlerotates, andis capable of longitudinal adjustment.

The outer face of the gear 27 forms the face plate to which the cuttingtool is attached, this'face being preferably provided with suitablytapped sockets 31 into which the tool fastening bolts are threaded. The

Vpresent machine is primarily designed for very heavy work in which faceplate tools are employed, but it will bemanifest that smaller tools maybe used vif desired b v mounting` the tool in the centrally disposedsocket 82 of the spindle.

instead of driving the spindle from its inner end, as has been thepractice to a large extent heretofore, I contemplate the provision ofdriving mechanism including a pinion which will mesh with the gear 27 atthe tool end of the spindle. This manner of driving obviates torsionalstrains on the tool spindle, thereby eliminating the tendency of thespindle to chatter in its bearings, which causes rough and uneven work.The spindle is, in the present instance, therefore driven from a pinion33 constructed integral with or fixedly attached to the outer end of thepinion shaftv 18 rotatably mounted in a sleeve 34 fitted into lthe bore18, suitable bushings 35 being preferably interposed between the shaftand the surrounding sleeve. Longitudinal movement of the shaftrelatively to the sleeve 34 is prevented by the inner face of the pinion33 and a lock nut Y 36 pinned, or otherwise fixed, upon the shaft at theinner end of the sleeve. The spindle shaft is driven from the main driveshaft 87 through a pair of intermeshing beveled gears 38 and 39, thegear 39 having a splined connection with the spindle shaft to permitlongitudinal. adjustment of said shaft, and the 88 being splined on theshaft 37 to permit adjustment of the saddle on the main frame withoutdisturbing the driving connection between the drive shaft 37 and thegear.

From Fig. 4it will be observed that the -the sleeve, suitable bushings45 and washers 46 being employed to take up the wear.

For the purpose of adjusting the spindle longitudinally to suit therequirements of the work I have equipped one face of the sleeve 19 withrack teeth 46 (Figs. 2, S and 9) and havemounted in the saddle an ,adjusting spindle lor shaft 47 equipped at its inner end with a pinion 48which meshes with the rack. The outer end of the spindle 47` is squared,as indicated at 49, to receive the handle or operating lever by means ofwhich the shaft 47 may be rotated to longitudinally adjust the toolspindle. 1t should be understood that 1 do not desire to limit myinvention to this particular means of adjustment since other mechanismsfor moving the sleeve 19 longitudinally will readily suggest themselvesto those skilled in the art.

Since the sleeves 19 and 34, in which the tool spindle 17 and the pinionshaft 18 are respectively mounted, project outwardly some littledistance beyond the face of the saddle it will be obvious that when thetool is doing very heavy work the enormous lateral pressure exerted uponthe tool will tend to spring and distortthe sleeve 19. For the purposeof backing up the 'sleeve and over coming any tendency of the same toyield or distortunder heavy work and also for the purpose of holding thepinion 33 in proper driving engagement with the gear i7 and,furthermore, to'insure the simultaneous and unitary longitudinalmovement of both sleeves 19 and B4 lwhen longitudinal adjustment of thespindle is required, 1 have rigidly connected the extremities Vof thesleeves 419 and 34 bymeans of a heavy substantial member 51 snuglyfitted upon the ends of the sleeves and preferably formed in the shapeof a housing, as shown, to sur-,-

the intermeshing and unyielding connection between theV rac sleeves, andwith this end in view I have tapped the housing and each sleeve to revceive the set-'screws 52 and 58as shown in Figs. 8 and 1 respectively.It will thus be manifest that this housing serves to cover the rear faceand the periphery of the pinion and gear 27 s0 as to protect theoperator against possible injury as well as serving as a rigid andinflexible connectionbetween the ends of the sleeves which willabsolutely pre- Tes clude relative movement between the sleeves eitherlaterally or longitudinally.

InY order' to protect the operative against becoming entangled in thepinion or gear wheel from the outer face I prefer to employ an outerplate 54 Vwhich completely covers the end of the pinion and also thegear teeth on gear 27, the gear 27 being provided with a peripheralgroove 55 to receive the plate 54 which lies back of the face of thegear on which the cutting tool is mounted. The gear is thereby whollyinclosed while the outer face of the gear 27, usually termed the faceplate, is left exposed for the attachment of the tool. Y

For the purpose of providing a simple, cheap and eficient means forlocking the spindles 19 and 34 in any position to which they may havebeen adjusted longitudinally I have provided the saddle 12 withintersecting longitudinal and transverse slots 56 and 57 formed in onewall of the bore 15 so as to provide a yielding portion 58 of the wallwhich may be tightly clamped about the sleeve 19 by means of clampingbolts 59. Similarly the wall of the bore 16 is provided withintersecting longitudinal and transverse slots 51 and 62 respectively,forming the yielding portion 63 which may be clamped around the sleeve34 to lock the same in adjusted position by means of the clamping bolts64. When it is desirable to adjust the spindle longitudinally the bolts59 and 64C are loosened so as to permit the required longitudinaladjustment of the sleeves 19 and Sil to be made, whereupon these boltsare again tightened up to securely and fixedly clamp the sleeves in theposition to which they have been adjusted. It will be obvious that sincethe spindle sleeve and the pinion shaft sleeve are rigidly connectedtogether by the housing 51 it is only necessary to provide adjustingmechanism for one of these sleeves, any adjusting movement of one sleevebeing transmitted to the other through the housing.

It will be understood from the foregoing that I have provided a saddlein which the tool spindle is firmly and unyieldingly mounted, in whichthe spindle is driven at the tool end so that all torsional strains uponthe spindle are obviated, that the spindle and pinion shaft are rigidlyconnected, thereby precluding vibration or chattering of the spindle andinsuring equal longitudinal movements of both members when adjustment isrequired, that the spindle driving gear is completely inclosed inprotected casing, and that a simple but highly eflicient means forlocking the spindle in adjusted position is provided in the body of thesaddle itself.

While I have shown and described a preferred embodiment of the inventionI do not desire to limit myself to the specific embodinaled respectivelyin said sleeves, a driving connection between said spindle and shaft,and means for rigidly connecting the projecting ends of said sleeves.

2. In a milling machine the combination of a saddle, a plurality ofsleeves mounted therein and projecting beyond the end of the saddle, aspindle journaled in one of said sleeves, a pinion shaft journaled inthe other sleeve, a driving connection between said spindle and shaft,means rigidly connecting the projecting ends of said sleeves, and meansfor adjusting), said sleeves longitudinally in the saddle.

3. In a milling machine the combination of a saddle, a pair of sleeveslongitudinally Vadjustable in said saddle, one end of each sleeveprojecting beyond the end of the saddle, a pinion shaft and a spindlejournaled respectively in said sleeves, means whereby the projectingends of said sleeves are rigidly connected together, and intermeshinggears carried by the outer ends of said pinion shaft and said spindlewhereby the spindle is driven from said shaft.

4, In a milling machine, the combination of a saddle, a pair oflongitudinally adjustable sleeves mounted in said saddle, a pinion shaftjournaled in one of said sleeves and provided at its outer extremitywith a pinion, a spindle journaled in the other sleeve and provided atits outer extremity with a gear-wheel meshing with said pinion, and ahousing disposed over said pinion and said gear, said housing beingiixedly secured to each of said sleeves whereby the sleeves are rigidlyconnected together.

5. In a milling machine, the combination of a saddle, a spindle sleevecarried thereby with one end projecting outside the saddle, a pinionsleeve also carried by the saddle and having one end projecting outsidethe saddle, a pinion shaft journaled in said pinion sleeve, a spindlejournaled in said spindle sleeve, driving means at the outer ends ofsaid spindle and pinion shaft whereby the spindle is driven from thepinion shaft, means whereby the outer ends of said sleeves are rigidlyconnected together, and means for adjusting said sleeves togetherlongitudinally in the saddle.

6. In a milling machine, the combination of a saddle, a pair of sleeveslongitudinally adjustable in said saddle, a spindle journaled in one ofsaid sleeves, means for preventing longitudinal movement of the spin-Vdle relatively to the sleeve,'a pinion shaft journaled in the othersleeve, means for preventing longitudinal movement of said pinion shaftrelatively to said sleeve, inter; meshing gears carried by the outerends of said shaft and spindle whereby the spindle is driven from saidshaft, and a housing inclosing said gears, said housing being rig-V idlyattached to each of said sleeves 'Whereby said sleeves are rigidlyAconnected together at their outer ends.

7. ln a milling machine, the combination of a saddle, a pair of sleevesslidably mounted in parallel relation in said saddle with their endsprojecting beyond the saddle, a spindle journaled in one oi said sleevesand provided at its outer end with a gear Wheel, a pinion shaftjournaled in the other sleeve and provided at its outer end with apinion meshing with said gear Wheel, means for rigidly connecting theouter ends of said sleeves together, means for .simultaneously adjustingsaid sleeves longitudinally in the saddle, means for preventinglongitudinal movement of the shaft and spindle relatively to thesleeves, and driving mechanism splined to said pinion shaft throughWhich power is applied to said spindle. Y

S. In a milling machine, the combination oi' a saddle provided Withaplurality of bores, a sleeve slidably disposed in each of said bores,means for adjusting said sleeves longitudinally of the bores, the Wallsof said bores being slotted to provide yielding clamping portions, andmeans for clamping said yielding portions around the sleeves to lock thesleeves in adjusted position.

9. In a milling machine, theV combination of a saddle,a plurality ofsleeves mounted axially movable therein with their corresponding endsprojecting beyond the saddle, a member rotatably mounted in each sleeve,a driving connection between said rotary members, and means rigidlyconnecting said projecting ends of the sleeves.

JOHN F. MCCANNA, J. R. JOHNSON.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents.

Washington, D. C. i

